topic Re: Incremental using fbackup in Operating System - HP-UX

Incremental using fbackup

Rajesh Patel — Thu, 09 Nov 2000 22:14:53 GMT

Hello,

i am new to the backup world. i want to know what happens if i follow the following schedule for backups :

Sun Mon Tue Wed Thu Fri Sat
0 5 5 5 5 5 5

the incremental that occurs does that occur from the last full backup or how does it work?

Thank you in advane for everyones help.

Thanks
Rajesh

Re: Incremental using fbackup

jherring — Thu, 09 Nov 2000 22:52:32 GMT

The best advice I can give without an extremely long message is to read the man page for fbackup.

man fbackup

The description describes graph files and how incrementals work and what the numbers mean and things of that sort.

If you havea more specific question I will be happy to answer in a more precise way.

Jon

Re: Incremental using fbackup

Elizabeth_2 — Thu, 09 Nov 2000 23:13:53 GMT

Hi Rajesh!

Level zero (0) is predefined to mean "the begining of time" by the fbackup command. If invoked without a backup level option, fbackup performs a level 0 backup that results in a full backup.

Levels 1- 9 are used for incremental backups. Each time fbackup is invoked with a backup level option, fbackup makes copies of files that have been changed since the last time a backup was made at a lower level.

ie. Suppose fbackup is run at level 0 on Monday, level 1 on Tuesday, and level 2 on Wednesday. A fullbackup is done on Monday, an incremental backup of the files that had changed since Monday wouldbe made on Tuesday, and an incremental backup of files that had changed since Tuesday would be made on Wednesday.

Futhermore, if you ran a level 2 backup on Thursday it would make an incremental backup of the files that had changed since tuesday. A level three backup on Thursday would only back up the files that had been modified since Wednesday.

I hope this helps and I haven't confused you. :-)

Elizabeth

Re: Incremental using fbackup

Vikas Khator — Fri, 10 Nov 2000 03:23:21 GMT

Hi Rajesh,

In your specific case it would do a full on Sunday and incremental on all other days with respect to Sunday's full backup.

e.g. on Thurs it will backup any files that have changed since Sunday -- the full backup day.

Try it out on a small directory